. >>> we have this breaking news now the fbi in philadelphia want to know who that person was who called in a hoax that forced a jetliner to make an unscheduled landing this morning. us airways flight had to return to philadelphia after it took off for dallas somebody called authorities claiming a man on that flight had a dangerous substance. a bomb squad searched the plane and found nothing that man is not a suspect and didn't do anything wrong. police call the hoax a nasty trick. >>> less than an hour from now, bells will be ringing in san francisco's union square. it is a tradition we were hoping to have those bells, we don't. muni's top crew will battle it out for the title of world champion cable car ringer today's event will feature an amateur contest followed by the main event. [ bells ringing ] >> that event is free. this is video from a past competition. a lot of folks like to try that out even the amateurs, i tried it once it is harder than you >> stay with us, a treat for chocolate lovers this weekend. i work at the cable company, and i get to wear a hard hat... a question alr